Which came first, the chicken or the egg? a. the egg, because the amniotic egg evolved well before the first bird. b. the egg, because the chicken is not a real species. c. the chicken, because during speciation the adult stage always precedes the juvenile stage. d. the chicken, because the amniotic egg did not evolve until after the first chicken appeared. e. the egg, because the chicken had to cross the road to sit on it?